Blood-viscosity reducing agent

Abstract

A blood-viscosity reducing agent contains a protein derived from Bacillus subtilis natto and including, sequentially from an amino group terminal, a first structural amino acid sequence having alanine, threonine, aspartic acid, glycine, valine, glutamic acid, tryptophan, asparagine, valine, aspartic acid, glutamine, isoleucine, aspartic acid, alanine, proline, lysine, alanine, tryptophan, alanine, leucine, glycine, tyrosine aspartic, acid, glycine, threonine, glycine, threonine, valine, valine, alanine, serine, isoleucine, aspartic acid, threonine, glycine, valine, glutamic acid, tryptophan, asparagine, histidine, proline, alanine, leucine, lysine, glutamic acid, lysine, tyrosine, arginine, glycine, tyrosine, asparagine, proline, glutamic acid, asparagine, proline, asparagine, glutamic acid, proline, glutamic acid, asparagine, glutamic acid, methionine, asparagine, tryptophan, tyrosine, aspartic acid, alanine, valine, alanine, glycine, glutamic acid, alanine, serine, proline, tyrosine, aspartic acid, aspartic acid, leucine, alanine, histidine, glycine, threonine, histidine, valine, and threonine, a second structural amino acid sequence having alanine, phenylalanine, serine, glutamic acid, aspartic acid, glycine, glycine, threonine, aspartic acid, alanine, aspartic acid, isoleucine, leucine, glutamic acid, alanine, glycine, glutamic acid, tryptophan, valine, and leucine, a third structural amino acid sequence having aspartic acid, alanine, glutamic acid, glycine, asparagine, proline, histidine, proline, glutamic acid, methionine, alanine, proline, aspartic acid, and valine, and a fourth structural amino acid sequence having valine, proline, glycine, glutamine, alanine, tyrosine, glutamic acid, aspartic acid, glycine, tryptophan, and aspartic acid, thereby reducing the viscosity of whole blood.

1 . A blood-viscosity reducing agent characterized by essentially consisting of a protein derived from  Bacillus subtilis  natto and including, sequentially from an amino group terminal, 
 a first structural amino acid sequence having alanine, threonine, aspartic acid, glycine, valine, glutamic acid, tryptophan, asparagine, valine, aspartic acid, glutamine, isoleucine, aspartic acid, alanine, proline, lysine, alanine, tryptophan, alanine, leucine, glycine, tyrosine aspartic acid, glycine, threonine, glycine, threonine, valine, valine, alanine, serine, isoleucine, aspartic acid, threonine, glycine, valine, glutamic acid, tryptophan, asparagine, histidine, proline, alanine, leucine, lysine, glutamic acid, lysine, tyrosine, arginine, glycine, tyrosine, asparagine, proline, glutamic acid, asparagine, proline, asparagine, glutamic acid, proline, glutamic acid, asparagine, glutamic acid, methionine, asparagine, tryptophan, tyrosine, aspartic acid, alanine, valine, alanine, glycine, glutamic acid, alanine, serine, proline, tyrosine, aspartic acid, aspartic acid, leucine, alanine, histidine, glycine, threonine, histidine, valine, and threonine,    a second structural amino acid sequence having alanine, phenylalanine, serine, glutamic acid, aspartic acid, glycine, glycine, threonine, aspartic acid, alanine, aspartic acid, isoleucine, leucine, glutamic acid, alanine, glycine, glutamic acid, tryptophan, valine, and leucine,    a third structural amino acid sequence having aspartic acid, alanine, glutamic acid, glycine, asparagine, proline, histidine, proline, glutamic acid, methionine, alanine, proline, aspartic acid, and valine, and    a fourth structural amino acid sequence having valine, proline, glycine, glutamine, alanine, tyrosine, glutamic acid, aspartic acid, glycine, tryptophan, and aspartic acid, thereby reducing the viscosity of whole blood.    
   
   
       2 . An agent according to  claim 1 , wherein the protein derived from  Bacillus subtilis  natto essentially consists of a soy protein fermentate obtained by removing, from a liquid medium of the  Bacillus subtilis  natto containing soy protein obtained from a soy bean, the body of  Bacillus subtilis  natto and low-molecular components having molecular weights lower than enzymes produced by the  Bacillus subtilis  natto.  
   
   
       3 . An agent according to  claim 2 , wherein the low-molecular components are removed by ultrafiltration.